I represent a company, American Dry Deck, which sells the best ceiling system on the market by far. Made of a polyvinyl alloy, the system is maintenance free and durable. The simply snap-locking design is water-tight without using any sealants. The system is engineered to channel water and debris away to guttering. The system is open to allow air to circulate between the deck boards and the system keeping the area dry. American Dry Deck is not only functional, but attractive with an arched cathedral styling.